The most common problem under Linux is that users install the wrong package on their system.

Please make sure that the architecture of your operating system matches the downloaded package:- For a 32bit Linux distribution, install the 32bit QCAD package.- For a 64bit Linux distribution, install the 64bit QCAD package.

To find out what system you have installed, please run the following command in a terminal:

uname -m

If the output is 'x86_64', you are running a 64bit Linux system, otherwise you are running a 32bit Linux system.

Note that the architecture of the underlying CPU is irrelevant - it's the operating system that makes the difference.

If this does not solve your problem, please try to launch QCAD from a terminal and post the output / error message here, thanks.

To launch QCAD from a terminal, please enter the following commands in a terminal (the name of the directory might be slightly different, depending on your version of QCAD):